cc: add rasterize time to continuous painting graph data in impl-side-painting

cc/paint_time_counter.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_PAINT_TIME_COUNTER_H_
 #define CC_PAINT_TIME_COUNTER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
 #include "cc/ring_buffer.h"
 
 namespace cc {
 
 // Maintains a history of paint times for each frame
 class PaintTimeCounter {
  public:
   static scoped_ptr<PaintTimeCounter> create();
 
   size_t HistorySize() const { return ring_buffer_.BufferSize(); }
 
   // n = 0 returns the oldest and
   // n = PaintTimeHistorySize() - 1 the most recent paint time.
   base::TimeDelta GetPaintTimeOfRecentFrame(const size_t& n) const;
 
-  void SavePaintTime(const base::TimeDelta& total_paint_time);
+  void SavePaintTime(const base::TimeDelta& total_paint_time,
+                     const int& frame_number);
   void GetMinAndMaxPaintTime(base::TimeDelta* min, base::TimeDelta* max) const;
 
  private:
   PaintTimeCounter();
 
   RingBuffer<base::TimeDelta, 80> ring_buffer_;
   base::TimeDelta last_total_paint_time_;
+  int last_frame_number;
 
   DISALLOW_COPY_AND_ASSIGN(PaintTimeCounter);
 };
 
 }  // namespace cc
 
 #endif  // CC_PAINT_TIME_COUNTER_H_